What do we think we're seeing for the trim cord? I've been puzzling over this for a few days now and haven't yet found any perfect matches.
Hank has found a very good one:
It's 90% close, but I'm having fun being obsessive here and want to see if I can manage something like 95.
I think the original may very well have been jute like the tapestry fabric itself, two individual cords of twine (black and natural burlap/jute) twisted together, something like this but with larger individual cords:
I'm thinking of buying two spools of black and tan twine like these:
And twisting them together. That new larger combined cord could then be flattened against the tapestry and sewn in a straight line with a sewing machine.
I honestly think could just as easily have been ready-made upholstery/drapery cording, perhaps in nylon. But I haven't yet been able to find a perfect match in looking through those types of trim. Hank's is the closest I've seen.
I think the jute twine approach will in any case yield a result that looks more "primitive" in person than nylon if we were able to find it.
Another replicator on the RPF of this prop did every single stitch by hand. Given the exigencies of television prop production, I'd be positively shocked if that is how the original were made—and, frankly, I don't have that kind of patience to replicate it myself anyway.
(Photo: navmidn on the RPF)